=== Format spec edge cases ===
Empty fmt: Template(strings=('', ''), interpolations=(Interpolation(42, '42', None, ''),))
Width: 'Template(strings=('', ''), interpolations=(Interpolation(42, '42', None, '10'),))'
Conv+fmt: 'Template(strings=('', ''), interpolations=(Interpolation(42, '42', 'r', '>10'),))'
Interp fmt: 'Template(strings=('', ''), interpolations=(Interpolation(3.14, '3.14', None, '10.2f'),))'
Escaped braces: 'Template(strings=('Hello {name} and {{value}}',), interpolations=())'
Conv empty fmt: 'Template(strings=('', ''), interpolations=(Interpolation(42, '42', 'r', ''),))'

=== Format spec edge cases ===
Full format: 'Template(strings=('', ''), interpolations=(Interpolation(42, 'x', 'r', '0>+#10.5'),))'

=== Format spec with special characters ===
Format spec '!r': True
Conversion is None: True

Coverage tests completed!

=== Debug format edge cases ===
Debug with conv: 'Template(strings=('x=', ''), interpolations=(Interpolation(42, 'x', 'r', ''),))'

=== Debug specifier tests ===
Debug basic: strings=('value=', ''), conv=r
Debug !s: strings=('value=', ''), conv=s
Debug fmt: strings=('value=', ''), fmt_spec='>10'

=== Large number of interpolations ===
62 True
63 True
64 True
65 True

=== Malformed format specs (valid in CPython) ===
Malformed 1: format_spec: '10!r', conversion: None
Malformed 2: format_spec: '^10!s', conversion: None
Malformed 3: format_spec: '>!10', conversion: None
Invalid unicode: SyntaxError - invalid syntax
Custom exception re-raised: Test exception

NULL lexer: Tested in heapalloc_fail_tstring.py
\N{} escape: SyntaxError
Raw Unicode escapes: '\u0041\U00000042'
CR LF handling: OK
Deep indent: OK
Trailing backslash: SyntaxError

=== Empty format spec node ===
Empty format after colon: OK

=== Format spec with special characters (coverage) ===
Double quotes expr: format_spec='^^^^^'
Backslash raw: format_spec='<5\\\\'
Backslash non-raw: format_spec='<5\\'
Multiple escapes: format_spec='<5\n\t\r'